1987 GMC R2500 Service and Repair Manual

This factory service and repair manual for the 1987 GMC R2500 carries six engines, all overhead-valve and naturally aspirated. They run from a 4.3L V6 and a 4.8L inline-six through gasoline V8s of 5.0, 5.7 and 7.4 liters to a 6.2L diesel V8. Crew cab and standard cab pickups and a two-door cab and chassis are covered in Base, High Sierra and Sierra Classic trim, each configuration served by the same system-by-system procedures, specifications, torque values, wiring diagrams and diagnostics.

Engines covered

• 5.0L V8 (305 cu in) — OHV, naturally aspirated, gasoline
• 7.4L V8 (454 cu in) — OHV, naturally aspirated, gasoline
• 6.2L V8 (379 cu in) — OHV, naturally aspirated, diesel
• 4.8L inline-six (292 cu in) — OHV, naturally aspirated, gasoline
• 4.3L V6 (262 cu in) — OHV, naturally aspirated, gasoline
• 5.7L V8 (350 cu in) — OHV, naturally aspirated, gasoline

Body styles covered

• 4-door crew cab pickup
• 2-door standard cab pickup
• 2-door cab & chassis

Trims covered

• Base
• High Sierra
• Sierra Classic

Known issues on the 1987 R2500. With six engines available, the engine sections are where most of the book's bulk sits — fuel, ignition and valvetrain specifications for the gasoline V6, inline-six and V8s, injection and glow plug procedures for the 6.2L diesel — and the chassis beneath them gets the same treatment, with brake, axle, suspension and steering procedures, torque values, wiring diagrams and diagnostics.